Codeforces Round 1076 C Replace and Sum | Greedy + Prefix Sum Explained (Div 3) | C++ Tutorial

Solve Problem C – Replace and Sum from Codeforces Round 1076 (Div. 3) step-by-step with a simple greedy insight and prefix sum optimization. In this video, we break down: ✅ Problem intuition in plain English ✅ Key greedy observation ✅ How to precompute optimal values ✅ Prefix sum trick for fast queries ✅ Full C++ implementation ✅ Time complexity explanation ✅ Tips for Div 3 contests This problem is a great example of turning operations into a suffix maximum strategy and answering queries in O(1). Perfect for: Competitive programming beginners Div 3 practice Greedy + data structure learning Interview prep 💻 Language used: C++17 ⏱ Complexity: O(n + q) per test case If this helped you, like & subscribe for more Codeforces explanations 🚀